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Article

Influence of β-Stabilizers on the α-Ti→ω-Ti Transformation in Ti-Based Alloys

1
Institute for Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
2
Scientific Center in Chernogolovka, Russian Academy of Sciences, Lesnaya str. 9, 142432 Chernogolovka, Russia
3
Institute of Solid State Physics, Russian Academy of Sciences, Ac. Ossipyan str. 2, 142432 Chernogolovka, Russia
4
Institute of Metallurgy and Materials Science, Polish Academy of Sciences, Reymonta St. 25, 30-059 Cracow, Poland
5
National University of Science and Technology «MISIS», Leninskii prosp. 4, 119049 Moscow, Russia
*
Author to whom correspondence should be addressed.
Processes 2020, 8(9), 1135; https://doi.org/10.3390/pr8091135
Received: 22 August 2020 / Revised: 8 September 2020 / Accepted: 9 September 2020 / Published: 11 September 2020
(This article belongs to the Special Issue Advances in Innovative Engineering Materials and Processes)
The development of next generation Ti-based alloys demand completely new processes and approaches. In particular, the Ti-alloys of next generation will contain not only α-Ti and β-Ti phases, but also small amounts of ω-phase and intermetallic compounds. The β→ω phase transformation induced by high-pressure torsion (HPT) has been studied in detail recently. In this work, we investigated the HPT-induced α→ω phase transformation. For this purpose, we added various β-stabilizers into α-Ti matrix of studied Ti-alloys. Ti-alloys with 4% Fe, 2% Cr, 3% Ni, and 4% Co (wt. %) have been annealed at the temperatures below their point of eutectoid decomposition, from β-Ti to α-Ti, and respective intermetallics (TiFe, Ti2Co, Ti2Ni, TiCr2). Volume fraction of HPT-driven ω-phase (from ≤5 up to ~80%) depended on the amount of alloying element dissolved in the α-matrix. Evaluation of lattice parameters revealed accelerated mass transfer during HPT at room temperature corresponding to bulk diffusion in α-Ti at ~600 °С. View Full-Text
Keywords: Ti-alloys; α-Ti→ω-Ti transformation; β-stabilizers; high-pressure torsion; mass transfer Ti-alloys; α-Ti→ω-Ti transformation; β-stabilizers; high-pressure torsion; mass transfer
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MDPI and ACS Style

Kilmametov, A.; Gornakova, A.; Karpov, M.; Afonikova, N.; Korneva, A.; Zięba, P.; Baretzky, B.; Straumal, B. Influence of β-Stabilizers on the α-Ti→ω-Ti Transformation in Ti-Based Alloys. Processes 2020, 8, 1135. https://doi.org/10.3390/pr8091135

AMA Style

Kilmametov A, Gornakova A, Karpov M, Afonikova N, Korneva A, Zięba P, Baretzky B, Straumal B. Influence of β-Stabilizers on the α-Ti→ω-Ti Transformation in Ti-Based Alloys. Processes. 2020; 8(9):1135. https://doi.org/10.3390/pr8091135

Chicago/Turabian Style

Kilmametov, Askar, Alena Gornakova, Mikhail Karpov, Natalia Afonikova, Anna Korneva, Pawel Zięba, Brigitte Baretzky, and Boris Straumal. 2020. "Influence of β-Stabilizers on the α-Ti→ω-Ti Transformation in Ti-Based Alloys" Processes 8, no. 9: 1135. https://doi.org/10.3390/pr8091135

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